Removable wheel for motor and other vehicles



Patented Sept. 25, 1934 4 nEMovBLE WHEEL FOR MOTOR AND OTHER VEHICLES ,Y

Hermann Kuhnen, Berlin, Germany A Application June as, 193s,A serial No.'678,005 InGerman'y June 29, 1932 1 claim.` (oi, 301-9) This inventionrelates to removable wheels, and 8, a fact which generally occurs,especially as the more especially to that type adapted to be mount-Wheel discs are in most cases manufactured in ed on flanges provided onthe axle hub of a other works than those producing the axle hubs.

p motor Vehicle. In fixing wheels by means of the usual hemi- In Wheelsof this type the nut of each fixing spherical or ball or taperedsurfaces engaging bolt is generally provided with a ball or cone withinrecesses or openings on the wheel discs, which is adapted to engage in arecess or openany inexactitudes in the register of the axes of ingprovided in the wheel disc; in some instances the bolts and the centreof the openings or resuch a spherical or conical or tapered surface iscesses are the cause of the spherical or conical 1U also provided on thebolt itself which is adapted surfaces of the nuts fitting tightly onlyon one @f5 to engage in a recess in the wheel disc, the said side of thewheel discs, a fact which is the cause recess forming a femalecounterpart into which of further stresses on the material of the Wheelthe male part fits. But in all cases avery strong disc at theseparticular points. 1 bursting action is exerted on the material of theThis defect also is completely eliminated by the ``5 Wheel disc, whenthe nuts are fully tightened up, present invention, as it ensures auniform t all P16 which may result in the destruction of the maaroundthe surface. terial. The female surface 7, instead of being on theAccording to the present invention this serious nut, may be provided onthe bolt and the male defect is eliminated by the fact that aconcavospherical surface 6 on the nut, this, of course,

*2"0 convex or like shaped part is formed on the wheel requiring acorrespondingly altered shape of the En;

body at each fixing point and adapted to be concavo-convex or likeportion 8 of the wheel clamped between a male and a female sphericaldisc l.

surface, one of the said surfaces being provided The present inventionmay also be adapted for on the fixing bolt and the other on the nutthereuse with coupling hubs of wire spoke wheels.

for. In the modified constructional form shown in Fg@ In order that thesaid invention may be clearly Figure 2, the spherical surface 6 of thebolt 4 is understood and readily carried into effect, the formed on anindividual and removable member same will now be described more fully,by way 10. By this arrangement, it is possible to use, at of example,with reference to the accompanying will, Wheels or to interchange Wheelswhich are,

`3`0 drawing, in Which:- according to the present invention, fixed tothe @ST5 Figure 1 is a fragmentary transverse sectional flange of thehub, or such where the nut of the view of a wheel embodying theinvention, and xing bolt provided with a ball or conical surface Figure2 is a similar View to Figure 1 but showengages in an opening or recessprovided therefor ing a mOdCatOn. in the wheel disc in the manner knownper se.

3'5" Referring lSt mOI'e pallllal'ly t0 Figure 1 0f In the latterinstance, however, a bolt provided 40" bolt 4 and a corresponding femalespherical sur- Change of the xing bolts for the Wheels is, howifswhereby the disc 1 is held securely in place.

portion 8 is adapted to fit between the spherical The removable member10 provided with the the drawing, the wheel disc 1 is Connected t0 awith a bali or Spherical surface could not be emcollar 2 of an axle hub,and to a brake drum 3, by ployed; it would therefore be necessary in themeans 0f bolt members 4 39d nut? 5- A male first instance to removethese bolts and to replace spherical seating surface 6 1s provided oneach them by thers having no bau Surface The eX face 7 spro'vided oneach nut 5' Th? Wheel ,disc ever, in the case of an assembled car sodifficult 1 1S provlded Wlth concg'vo'convex or hke portlons that it isof very little practical use. But if the 8 which Correspond Wlth sindare adapted to 'be spherical surface 6 of the bolt is, as shown inclamped between the sphencal surfaces 6 and 'l Figure 2 formed on aseparate removable mem l when the Various parts are Screwed up tight ber10, then 1t is only necessary to place this the bolt 4 th t on 8 memberon or remove the same from stIe-,lhsga grlrlrolntreegor 1 according toWhether Wheels of one or the other As each nut 5 is screwed home, therespective type of mounting are to be used' surfaces 6 and 7 in such a,manner that a, perspherical or ball surface 6 is, as shown, preferablyfect and complete t of the portion 8 against the provided With aSphellal SllIfaCe 11 adapted GO bolt 4 and the nut 5 is obtained, evenif the lonengage a corresponcimsly Shaped recess in the Y r. gitudinalaxis or centre line of the bolt is not in brake drum 3 or a suitablerecess provided 1n the dit perfect alignment with the centre of theportion hub flange 2. By these means an absolutelyA seiii@ ,i

cure t and seating of the member 10 is ensured,

as the play or tolerance allowed between the member 10 and the bolt 1for the purpose of facilitating the removal of the member 10 isneutralized 5 by reason of the t of the spherical surfaces, and byreason that the radial stresses are fully and well absorbed. vMoreover,the fitting in of the portion 8 and the corresponding spherical surfaceof the removable member 10 is greatly improved. The bore of the member10 is preferably tapered, thus producing a larger Zone for the tting inof the spherical or ball surfaces.

I claim:

In combination, in a demountable vehicle'wheel construction of the typeincluding a hub having a ange provided with a series of spaced holesarranged in a circle and bolts in said holes, a demountable wheel havinga flange provided with a series of oircumferentially spaced holes whichapproximately register with said first-mentioned holes, saidlast-mentioned holes also receiving said bolts, and nuts on the axiallyouter ends of said bolts, said construction including hollow sphericalportions formed in said wheel flange protruding axially outwardly andeach centered on the axis of a hole, a spherically shaped shoulder oneach bolt of the same contour as the axially inner side of a hollowspherical portion and received by said spherical portion, and aspherical recess on the axially inner side of each nut of the samecontour as the outer side of a hollow spherical portion, the surfaces ofthe spherical portions of the nuts, respective hollow spherical wheelportions and spherically shaped shoulders all having their sphericalsurfaces centered at common points in substantially the plane of therear of said wheel flange when their axes are aligned and said hollowspherical portions are clamped between the nuts and the sphericallyshaped shoulders.

HERMANN KUHNEN.

